Wafer lens aligning method and wafer lens manufactured by the same

Abstract

Provided is a wafer lens aligning method including the steps of: preparing a lens mold that has a lens forming portion formed in the central portion thereof and a groove formed around the lens forming portion; preparing a wafer that has two or more position recognition patterns formed at arbitrary positions thereof and a plurality of minute patterns formed in array at lens formation positions; loading the wafer, searching the position recognition patterns, and setting a coordinate system; causing the coordinate system of the wafer to coincide with the coordinate system of the lens mold; causing the center among the minute patterns formed on the wafer to coincide with the center of the lens mold so as to align the wafer with the lens mold; and forming a master lens in the lens formation positions arranged on the wafer.

1 . A wafer lens aligning method comprising the steps of:
 preparing a lens mold that has a lens forming portion formed in the central portion thereof and a groove formed around the lens forming portion;   preparing a wafer that has two or more position recognition patterns formed at arbitrary positions thereof and a plurality of minute patterns formed in array at lens formation positions;   loading the wafer, searching the position recognition patterns, and setting a coordinate system;   causing the coordinate system of the wafer to coincide with the coordinate system of the lens mold;   causing the center among the minute patterns formed on the wafer to coincide with the center of the lens mold so as to align the wafer with the lens mold; and   forming a master lens in the lens formation positions arranged on the wafer.   
     
     
         2 . The wafer lens aligning method according to  claim 1 , wherein polymer-based resin for molding a lens is injected into the lens forming portion formed in the central portion of the lens mold, and the mold is closely contacted with the lens formation position of the wafer. 
     
     
         3 . The wafer lens aligning method according to  claim 1 , wherein the position recognition patterns are formed in a dot shape, a cross shape, or a circular shape. 
     
     
         4 . The wafer lens aligning method according to  claim 1 , wherein the minute patterns are formed of metal. 
     
     
         5 . The wafer lens aligning method according to  claim 4 , wherein the minute patterns are formed in a linear shape so as to be spaced at a predetermined distance from the groove, the minute patterns being symmetrical with each other. 
     
     
         6 . The wafer lens aligning method according to  claim 4 , wherein the minute patterns are formed in a circular arc having an approximate curvature to the circumference of the groove. 
     
     
         7 . A wafer lens manufactured by the wafer lens aligning method according to  claim 1 . 
     
     
         8 . The wafer lens according to  claim 8 , wherein the wafer lens has a projection formed on the surface thereof corresponding to the top surface of the lens mold, the projection being formed by transferring resin into the groove.